mariadb start with an error on ubuntu 16.04 LTS

Hello,

Here is my configuration :

lsb_release -rd
Description: Ubuntu 16.04 LTS
Release: 16.04
uname -a
Linux mparchet-W240EU-W250EUQ-W270EUQ 4.4.0-18-generic #34-Ubuntu SMP Wed Apr 6 14:01:02 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
package affect :

apt-cache policy mariadb-server-10.0
mariadb-server-10.0:
  Installed: 10.0.24-7
  Candidate: 10.0.24-7
  Version table:
 *** 10.0.24-7 100
        100 /var/lib/dpkg/status
     10.0.24-1ubuntu2 500
        500 http://archive.ubuntu.csg.uzh.ch/ubuntu xenial-proposed/universe amd64 Packages
     10.0.23-2 500
        500 http://archive.ubuntu.csg.uzh.ch/ubuntu xenial/universe amd64 Packages

Actuuel result :

systemctl status mysql.service
● mysql.service - LSB: Start and stop the mysql database server daemon
   Loaded: loaded (/etc/init.d/mysql; bad; vendor preset: enabled)
   Active: active (running) since sam. 2016-04-23 11:40:47 CEST; 10h ago
     Docs: man:systemd-sysv-generator(8)
  Process: 1348 ExecStart=/etc/init.d/mysql start (code=exited, status=0/SUCCESS
    Tasks: 27 (limit: 512)
   CGroup: /system.slice/mysql.service
           ├─1415 /bin/bash /usr/bin/mysqld_safe
           ├─1416 logger -p daemon err -t /etc/init.d/mysql -i
           ├─1655 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plu
           └─1656 logger -t mysqld -p daemon error
mysqld[1656]: 160423 11:40:46
 mysqld[1656]: Version: '10.0.2
systemd[1]: Started LSB: Start

Expended result :

mariadb work :

Could you help me please ?

Thanks for your support

Best regards

Battant